diff --git a/utils/functional.go b/utils/functional.go
index c8f69fd..f61dae2 100644
--- a/utils/functional.go
+++ b/utils/functional.go
@@ -16,6 +16,14 @@ func Reduce[S, T any](source []S, initialValue T, f func(T, S) T) T {
 	return acc
 }
 
+func ReduceIndexed[S, T any](source []S, initialValue T, f func(T, S, int, []S) T) T {
+	acc := initialValue
+	for index, elem := range source {
+		acc = f(acc, elem, index, source[:])
+	}
+	return acc
+}
+
 func Filter[T any](source []T, f func(T) bool) []T {
 	var dest []T
 	for _, elem := range source {